Power electronic system with switching device and liquid cooling device

The invention relates to a power electronics system having a switching device and a liquid cooling device, the switching device having a plate element on the side of which a power semiconductor component is arranged facing away from the liquid cooling device, the liquid cooling device having a first part and a second part, the first part having an inflow volume region and an outflow volume region, wherein a cooling volume region is formed between the two split parts, a plurality of heat transfer bodies extend into the cooling volume region from the second split part, and the second split part is preferably completely arranged in a recess of the first split part. The two parts are connected to one another in a material-bonded and liquid-pressure-tight manner and have a common flat surface forming a first main surface, and wherein the liquid cooling device is designed and arranged for a cooling liquid to flow from the inflow volume region to the outflow volume region via the cooling volume region, and wherein t